Optical lens

Patent metadata

Field	Value
Publication number	US-12043684-B2
Application number	US-201917043359-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	Mar 30, 2018
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

The optical lens of the present invention contains a molded product constituted with a cyclic olefin-based copolymer having a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin, and a constitutional unit (C) derived from an aromatic vinyl compound represented by a specific chemical formula.

First claim

The invention claimed is:

1. An optical lens constituted with a molded product containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin, and a constitutional unit (C) derived from an aromatic vinyl compound represented by general formula (C-1),

wherein in formula (C-1), any one of all Rs represented by R 1 to R 10 is a hydrocarbon group having a vinyl group represented by formula (D-1), * in formula (D-1) represents a bond,
in formulas (C-1) and (D-1), all of m and n represent 0, q represents a positive integer,
R 1 to R 10 other than the hydrocarbon group having a vinyl group represented by formula (D-1), R 21 , and R 22 each independently represent a hydrogen atom, a halogen atom except for a fluorine atom, or a hydrocarbon group having 1 to 20 carbon atoms that may be substituted with a halogen atom except for a fluorine atom,
R 2 and R 3 , and R 7 and R 8 may form a monocyclic ring by being bonded to each other, and the monocyclic ring may have a double bond,

wherein in a case where a total content of the constitutional unit (A), the constitutional unit (B), and the constitutional unit (C) in the cyclic olefin-based copolymer is 100 mol %, a content of the constitutional unit (A) in the cyclic olefin-based copolymer is 50 mol % or more and 70 mol % or less.

2. The optical lens according to claim 1 ,
wherein an Abbe number (v) is 30 or more and 55 or less.

3. The optical lens according to claim 1 ,
wherein in a case where a total content of the constitutional unit (B) and the constitutional unit (C) in the cyclic olefin-based copolymer is 100 mol %, a content of the constitutional unit (C) in the cyclic olefin-based copolymer is 1 mol % or more and 95 mol % or less.

4. The optical lens according to claim 1 ,
wherein the cyclic olefin contains a compound represented by formula (B-1),

wherein in formula [B-1], n is 0 or 1, m is 0 or a positive integer, q is 0 or 1, to R 18 , R a , and R b each independently represent a hydrogen atom, a halogen atom, or a hydrocarbon group which may be substituted with a halogen atom, R 15 to R 18 may form a monocyclic ring or a polycyclic ring by being bonded to each other, the monocyclic ring or the polycyclic ring may have a double bond, and R 15 and R 16 or R 17 and R 18 may form an alkylidene group.

5. The optical lens according to claim 4 ,
wherein m in formula (B-1) represents a positive integer.

6. The optical lens according to claim 1 ,
wherein in general formulas (C-1) and (D-1), q represents 1 or 2.

7. The optical lens according to claim 1 ,
wherein a glass transition temperature (Tg) of the cyclic olefin-based copolymer measured using a differential scanning calorimeter (DSC) is 100° C. or higher and 180° C. or lower.

8. The optical lens according to claim 1 ,
wherein a limiting viscosity [η] of the cyclic olefin-based copolymer measured in decalin at 135° C. is 0.05 dl/g or higher and 5.00 dl/g or lower.

9. The optical lens according to claim 1 ,
wherein a birefringence is 1 nm or higher and 200 nm or lower.

10. The optical lens according to claim 1 ,
wherein the aromatic vinyl compound contains allylbenzene.

Assignees

• Mitsui Chemicals Inc

Inventors

• WASA Hideki
• Moorthi Sunil Krzysztof
• Saito Haruka
• Fujimura Futoshi

Classifications

• C08F210/02 Primary

  Ethene · CPC title

• G02B2003/0093

  characterised by the shape · CPC title

• G02B3/00

  Simple or compound lenses · CPC title

• G02B1/041

  Lenses · CPC title

• C08F212/32 Primary

  containing two or more rings · CPC title